Used to describe what will happen if a stated action or condition is not completed.
“Applicants must confirm attendance by May 1, failing which their spot will be given away.”
“Tenants must report damages within 48 hours, failing which repair costs may not be covered.”
This is a formal phrase found in stricter regulation passages, warning of a consequence if a requirement is not met, such as 'submit payment by Friday, failing which the reservation will be cancelled.' Part 2 questions may test whether you understood the penalty tied to missing a deadline or condition.
Synonyms: otherwise, if not, in default of which